Shadowdust: Interesting... Did you try tweaking NB and CPU-NB voltage? Maybe some increasing on NB and CPU-NB help you with CPU OC. Try CPU 1.425, CPU-NB +0.1 ( NB set do default speed - 2000MHz), NB 0.1V and RAM to 800 speed and loose timings. Then try to boot at 3.6 and do so stress testing - if CPU fail, try with more CPU voltage, if fail too you have probadly "ordinary" CPU nad over 3.5 dont go. I can do 3650 with 2600 NB, but 3720 isnt totally stable, but CB x64 and wprime is ok, but linx not. If you need fufther info please send me PM.

Thanks for the info guys. If I ever decide to put the 940 back in my case, I'll try the settings you suggested, froxic. Currently, I'm using a PII 550 BE oc'd to 3.6 GHz on 1.40 vcore. Also, I was fortunate enough to unlock the other two cores with ACC.

When the NIC issue first started, I tried resetting the CMOS but no luck with everything returning to normal. What's interesting is that my router detects the port in gigabit mode. But when I check the cable status in the BIOS it says something about testing a virtual connection as if there is no connection. I may try resetting the CMOS again just to be sure.

Well your OC is still better than what I could accomplish with a 940. I was only able to manage 3.5 GHz at 1.425 vcore. I could boot Windows at 3.6 GHz but within one minute of Prime95 stressing, I'd get a blue screen.

Has anyone had any ethernet issues? Recently, my ethernet disappeared in my Device Manager. At first I thought it was completely dead so I hooked it into an old 10/100 Linksys switch. When I would reboot, the ethernet would reappear. The moment I brought it back to my gigabit router though, it would disappear again. So I finally reduced the speed to 100 Mb and hooked it back to my gigabit router. It is recognized on that router now. I don't like being limited in my transfer speeds, so I recently purchased a cheap ethernet card. Anyway, it's really an annoying issue and I am quite curious if I'm the only one who has experienced this.

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my AIR x4 955 1.475V and 3.895 GHz stable, NB 2665 MHz. I know some guys with 3.9 up or 4 GHz stable at AIR, but it with only x4 955 BE and x4 965 BE (better chips).
For x4 940 is mostly 3.6-3.7GHz stable.

my AIR x4 955 1.475V and 3.895 GHz stable, NB 2665 MHz. I know some guys with 3.9 up or 4 GHz stable at AIR, but it with only x4 955 BE and x4 965 BE (better chips).
For x4 940 is mostly 3.6-3.7GHz stable.

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Yep for 940 is common 3.6-3.7. 3.8 GHz is for best chips, and in your case 3.4-3.5 is for worst - but this is normal in overclocking that some chips are better then other. Anyway - 3.5 is 500 MHz difference and for free. I remember my first AMD rig with Athlon XP Palomino - i was very dissapointed, because i can overclock it from 1666 to 1700 and no further

Hi, I'm currently with bios F3f.I want to try to unlock my Ph II 550 but I can't see the Hybrid mode in the BIOS.In the last few pages it was mentioned that in the BIOS I'm using this function is missing.So which BIOS do you recommend me?
I got my CPU to 3830MHz stable.It probably can do more but i'm not the best overclocker.Now I'm using it on default with Cool'n'Quiet enabled.
P.S. Sorry for my bad English.

You must push CTRL+F1 (maybe ALT+F1) in main bios scrren, then some hided parts of bios appear. Then go to ACC ( Advanced clock calibration ) page, and there is hybrid mode you wished. And you can be calm, in my opinion F3 has same OC cappabilities like F5, so you can stay at F3 version.

No problem, but photo you posted is removed. There is still hope to make it stable. What clock youre traing for 4 cores? Default or your max OC speeds? Try default - when faul raise voltage - max 1.45V (for further increasing is needed extreme air cooling, water, dice, LN2, etc.

You can find worst core too if youre set afinity to core 1.. to core 4 in steps, then you can add more voltage with ACC to worst/faulty core indepedently to other cores.

Overclocking is hard work, but you can push it harder and maybe you can unlock to 4 stable cores after some tweaking

On weekends Il try some Benchmarks: my point are:
Cinebench in x64 at 3.95 GHz
Superpi 32M: more than 4 GHz

all AIR cooling

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I wish you luck. Superpi is possible at 4 GHz or more, but Cinebench X64 is nuts in 3.95. It will be mybe posible only in winter when youre put pc to the windows and keep it in freeze (im planing to do this)

No problem, but photo you posted is removed. There is still hope to make it stable. What clock youre traing for 4 cores? Default or your max OC speeds? Try default - when faul raise voltage - max 1.45V (for further increasing is needed extreme air cooling, water, dice, LN2, etc.

You can find worst core too if youre set afinity to core 1.. to core 4 in steps, then you can add more voltage with ACC to worst/faulty core indepedently to other cores.

Overclocking is hard work, but you can push it harder and maybe you can unlock to 4 stable cores after some tweaking

In taskmanager in windows, browse to process tab, then choose process that you want change affinity and right click on in and choose set affinity ...

So when youre stress testing CPU, do it separately for each core

EDIT: ACC is none-related to CPU affinity, In ACC you can only increase or decrease CPU cores voltage separately. So for examle you find that core 4 is faulty and you have ACC setings +2 +2 +2 +2 on all cores, you put new settings +2 +2 +2 +4(+6) or somethink like that and you can pray that it will works. But first, try to boot at very low speeds, like 800 or 1000 MHz on CPU, when it will be unstable, i think you havent chance to stable it